Erosion in the river has led to collapse of the barbed wire fence in some sections of the border, besides creating hazards for foot patrol units, BSF sources said.
"Recurrent floods have led to collapse of the fence at stretches in the past couple of years and it has also created problem for foot patrolling at the stretch. This is hampering our forces under Cachar-Mizoram Headquarters from carrying out normal duty of maintaining vigilance and surveillance," the sources said.
The fence along the alignment between Mubarakpur and Jawainpur outposts has collapsed, the sources said.
The situation is turning critical due to the incessant sloughing by the Kushiara, which is a tributary of the Barak river.
BSF officials said the riverine border is a hotspost of illegal immigrants from Bangaldesh and the unfenced border has encouraged such people to attempt hazardous crossing across the river.
"The wide gap between the fencing and the large stretches of unfenced border further aggravate the task of border management," the sources said.
The BSF officials also want reducing the distance between two border posts in the Cachar-Mizoram zone to one kilometre from the current 3-5 kilometre.
In 2010, the border post at Kalinagar as well as some other outposts in the Karimganj sector were badly affected during the monsoon season, forcing the jawans to shift to safer places.
